What is the cheapest airline that flies from Austin Bergstrom to Illinois?

Frontier, Southwest, and United Airlines are the most popular carriers operating from Austin Bergstrom to Illinois

How many flights depart from Austin to Illinois on average per week?

As of July 2026, 300 flights take off from Austin and land in Illinois each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.

What airlines fly to Illinois?

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Illinois from Austin according to our data. American Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Austin to Illinois on average per day?

The number of flights available between Austin and Illinois is 42 per day as of July 2026. The most frequent departure time is 3:00PM, with 42% of daily flights leaving at noon.

When did momondo last update prices for flights from Austin Bergstrom Airport to Illinois?

Prices for flights from Austin Bergstrom Airport to Illinois refresh daily.

How many operators does momondo search for flights from Austin Bergstrom Airport to Illinois?

As of July 2026, there are 6 operators available to choose from for flights from Austin Bergstrom Airport to Illinois.

How old do you have to be to fly from Austin Bergstrom Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Austin Bergstrom Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$86 Cheap Flights from Austin to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Austin to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:33 pm - 8:57 am

AUS

STL

19h 24m

1 stop

4:57 pm - 4:39 pm

STL

AUS

23h 42m

1 stop

$168Frontier

Fri, Aug 7 - Mon, Aug 10

1:33 pm - 8:57 am

AUS

STL

19h 24m

1 stop

4:57 pm - 4:39 pm

STL

AUS

23h 42m

1 stop

$172Frontier

Fri, Aug 7 - Mon, Aug 10

7:30 am - 9:35 am

AUS

STL

2h 05mnonstop

8:50 pm - 10:50 pm

STL

AUS

2h 00mnonstop

$180Southwest

Tue, Aug 4 - Tue, Aug 11

4:45 pm - 8:40 pm

AUS

STL

3h 55m

1 stop

8:25 am - 10:25 am

STL

AUS

2h 00mnonstop

$184Southwest

Tue, Aug 4 - Tue, Aug 11

6:38 pm - 12:05 am

AUS

MLI

5h 27m

1 stop

4:57 pm - 9:58 pm

MLI

AUS

5h 01m

1 stop

$231American Airlines

Sat, Sep 12 - Tue, Sep 15

5:30 am - 12:32 pm

AUS

MLI

7h 02m

2 stops

5:00 pm - 10:45 pm

MLI

AUS

5h 45m

1 stop

$236United Airlines

Sat, Sep 12 - Tue, Sep 15

5:30 am - 12:31 pm

AUS

MLI

7h 01m

2 stops

2:28 pm - 10:54 pm

MLI

AUS

8h 26m

2 stops

$241United Airlines

Wed, Sep 23 - Wed, Sep 30

3:27 pm - 6:35 pm

AUS

ORD

3h 08mnonstop

7:15 pm - 9:59 pm

ORD

AUS

2h 44mnonstop

$261American Airlines

Sat, Aug 8 - Sat, Aug 15

3:00 pm - 10:48 pm

AUS

BMI

7h 48m

1 stop

12:09 pm - 8:22 pm

BMI

AUS

8h 13m

1 stop

$309Delta

Mon, Jul 27 - Wed, Aug 5

4:55 pm - 10:31 pm

AUS

MLI

5h 36m

1 stop

6:00 am - 11:00 am

MLI

AUS

5h 00m

1 stop

$324Delta

Tue, Jul 21 - Mon, Aug 3

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Delta flights from Austin to Illinois

Our best Delta deals on Austin to Illinois flight tickets

Delta

Aug 18

AUS1:34 pmAustin Bergstrom

4h 53m

1 stop

STL6:27 pmLambert-St Louis

Aug 20

STL5:23 pmLambert-St Louis

6h 55m

1 stop

AUS12:18 amAustin Bergstrom

$229

Delta

Nov 21

AUS6:15 pmAustin Bergstrom

5h 35m

1 stop

ORD11:50 pmChicago O'Hare Intl

Nov 24

ORD5:55 pmChicago O'Hare Intl

6h 37m

1 stop

AUS12:32 amAustin Bergstrom

$281

Delta

Sep 3

AUS5:20 amAustin Bergstrom

7h 19m

1 stop

MDW12:39 pmChicago Midway

Sep 5

MDW4:39 pmChicago Midway

7h 20m

1 stop

AUS11:59 pmAustin Bergstrom

$306

United Airlines flights from Austin to Illinois

Our best United Airlines deals on Austin to Illinois flight tickets

United Airlines

Sep 12

AUS5:30 amAustin Bergstrom

7h 02m

2 stops

MLI12:32 pmMoline Quad-City

Sep 15

MLI5:00 pmMoline Quad-City

5h 45m

1 stop

AUS10:45 pmAustin Bergstrom

$236

United Airlines

Sep 23

AUS5:30 amAustin Bergstrom

7h 01m

2 stops

MLI12:31 pmMoline Quad-City

Sep 30

MLI2:28 pmMoline Quad-City

8h 26m

2 stops

AUS10:54 pmAustin Bergstrom

$241

United Airlines

Aug 29

AUS5:32 pmAustin Bergstrom

5h 27m

1 stop

STL10:59 pmLambert-St Louis

Aug 30

STL5:10 amLambert-St Louis

6h 06m

1 stop

AUS11:16 amAustin Bergstrom

$249

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 8/7

1:33 pm-8:57 am

1 stop19h 24m

Lambert-St Louis

Mon 8/10

4:57 pm-4:39 pm

1 stop23h 42m

$168

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 8/7

1:33 pm-8:57 am

1 stop19h 24m

Lambert-St Louis

Mon 8/10

4:57 pm-4:39 pm

1 stop23h 42m

$172

Quickest round-trip

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 8/4

7:30 am-9:35 am

Nonstop2h 05m

Lambert-St Louis

Tue 8/11

8:50 pm-10:50 pm

Nonstop2h 00m

$180

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 8/4

4:45 pm-8:40 pm

1 stop3h 55m

Lambert-St Louis

Tue 8/11

8:25 am-10:25 am

Nonstop2h 00m

$184

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Sat 9/12

6:38 pm-12:05 am

1 stop5h 27m

Moline Quad-City

Tue 9/15

4:57 pm-9:58 pm

1 stop5h 01m

$231

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Sat 9/12

5:30 am-12:32 pm

2 stops7h 02m

Moline Quad-City

Tue 9/15

5:00 pm-10:45 pm

1 stop5h 45m

$236

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Wed 9/23

5:30 am-12:31 pm

2 stops7h 01m

Moline Quad-City

Wed 9/30

2:28 pm-10:54 pm

2 stops8h 26m

$241

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Sat 8/8

3:27 pm-6:35 pm

Nonstop3h 08m

Chicago O'Hare Intl

Sat 8/15

7:15 pm-9:59 pm

Nonstop2h 44m

$261

AustinBloomington

AUS - BMI

AUSBMI

Austin Bergstrom

Mon 7/27

3:00 pm-10:48 pm

1 stop7h 48m

Bloomington-Normal

Wed 8/5

12:09 pm-8:22 pm

1 stop8h 13m

$309

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Tue 7/21

4:55 pm-10:31 pm

1 stop5h 36m

Moline Quad-City

Mon 8/3

6:00 am-11:00 am

1 stop5h 00m

$324

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Austin to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Austin is in November. Flight prices, which tend to average around $49, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $51.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Austin to Illinois is on a Friday when prices can be found for as low as $365. Flights from Austin to Illinois on a Sunday will generally be more expensive and average around $566. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Austin to Illinois during this time can be as low as $245. Flights at noon are often more expensive with an average ticket price of $514.

What is the cheapest Austin Bergstrom to Illinois flight route?

Fly from Austin Bergstrom to Chicago O'Hare Intl for the best Austin Bergstrom - Illinois flight prices

How far in advance should I book a flight from Austin to Illinois?

You are more likely to see cheaper flights to Illinois from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $298 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Austin for as low as $251 on momondo.

What cabin class options are available on Austin to Illinois flights?

There are 4 cabin classes available to choose from on Austin to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Austin to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Austin to Illinois

Best Price Found	$186
Fastest flight time	2h 05m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Austin in the past 72 hours is $186. The best round-trip flight deal from Austin to Illinois found on momondo in the last 72 hours is $313.

The fastest flight from Austin to Illinois takes 2h 05m

Direct flights go from Austin to Illinois every day.

There are 98 airports in Illinois. From Austin there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from Austin to Illinois

When did momondo last update prices for flights from Austin Bergstrom Airport to Illinois?
Prices for flights from Austin Bergstrom Airport to Illinois refresh daily.
How many operators does momondo search for flights from Austin Bergstrom Airport to Illinois?
As of July 2026, there are 6 operators available to choose from for flights from Austin Bergstrom Airport to Illinois.
How old do you have to be to fly from Austin Bergstrom Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Austin Bergstrom Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Austin to Illinois?
Based on momondo bookings for flights between Austin and Illinois, the leading plane model is Boeing 737-800, making up 35.80% of the total bookings. Other popular models include Boeing 737 MAX 8 with 13.58%, Boeing 737 MAX 9 with 13.11%, and Airbus A319 with 10.79%.

Best airlines flying from Austin to Illinois

Compare and see reviews for airlines that fly from Austin to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $69	Free Cancellation	Rating 5.6 2,839 reviews	Search Frontier flights
Southwest	PriceFrom $143	Free Cancellation	Rating 7.9 4,250 reviews	Search Southwest flights
Delta	PriceFrom $162	Free Cancellation	Rating 7.8 8,450 reviews	Search Delta flights
American Airlines	PriceFrom $166	Free Cancellation	Rating 7.1 11,783 reviews	Search American Airlines flights
JetBlue	PriceFrom $173	Free Cancellation	Rating 7.1 3,009 reviews	Search JetBlue flights
United Airlines	PriceFrom $190	Free Cancellation	Rating 7.4 9,944 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Austin to Illinois?

Finding the right flight to Illinois from Austin is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Austin to Illinois with flexible booking policies on momondo?

Yes. All flights to Illinois from Austin on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Austin to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Austin. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Austin to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Austin to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Popular cities in Illinois

Flights to New Yorkfrom $76

Flights to Los Angelesfrom $55

Flights to Miamifrom $74

Flights to Orlandofrom $63

Flights to Chicagofrom $57

Flights to San Franciscofrom $56

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $58

Flights to Bostonfrom $96

Flights to Atlantafrom $50

Flights to Fort Lauderdalefrom $63

Flights to Dallasfrom $62

Cheap flights from Austin to Illinois from $86

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Austin to Illinois departing on 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Austin to Illinois

Our best Delta deals on Austin to Illinois flight tickets

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How to get the cheapest flight ticket from Austin to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Austin Bergstrom to Illinois flight route?

How far in advance should I book a flight from Austin to Illinois?

What cabin class options are available on Austin to Illinois flights?

What is the cheapest airline that flies from Austin Bergstrom to Illinois?

What airlines fly to Illinois?

How many flights depart from Austin to Illinois on average per day?

How many flights depart from Austin to Illinois on average per week?

Cheap Austin to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Austin to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Austin to Illinois

Best airlines flying from Austin to Illinois

Compare and see reviews for airlines that fly from Austin to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

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